US2987427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal coating baths
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1958-01-27
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Granted: 1961-06-06
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Expires: 1978-01-27
Abstract
No abstract record available.
Inventors
- 👤 Shaw Richard Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:23
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/73; B; B01; B01J; B01J19/00; B01J19/02; B01J19/16; C23G; C23G1/00; C23G1/02; B01J2219/00; B01J2219/02; B01J2219/0204; B01J2219/025; B01J2219/0277
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN A PROCESS FOR THE ACID COATING OF A METAL BY IMMERSING SAID METAL IN A HEATED ACID COATING SOLUTION HAVING VOLATILE OR DECOMPOSABLE COMPONENTS THEREIN, THE IMPROVEMENT WHEREBY LOSS OF COMPONENTS FROM SAID SOLUTION BY VOLATILIZATION AND DECOMPOSITION IS MINIMIZED, SAID IMPROVEMENT COMPRISING IMMERSING SAID METAL IN A HOT COATING SOLUTION COVERED WITH A NON-AQUEOUS SURFACE LAYER OF INERT MATERIAL WHICH IS LIQUID AT THE OPERATING TEMPERATURE, SAID LIQUID BEING SUBSTANTIALLY IMMISCIBLE WITH SAID ACID COATING SOLUTION, SUBSTANTIALLY NON-VOLATILE AND STABLE AT THE OPERATING TEMPERATURE OF SAID BATH AND INERT WITH RESPECT TO THE CONSTITUENTS OF THE BATH, BOTH SAID SOLUTION AND SAID LAYER HAVING A SURFACE ACTIVE AGENT DISSOLVED THEREIN, THE AMOUNT OF AGENT IN SAID SOLUTION BEING SUFFICIENT TO LOWER THE SURFACE TENSION THEREOF TO LESS THAN 40 DYNES/CM.
Claim 2
Dependent Claim
132 words
IN A PROCESS FOR THE ACID COATING OF A METAL BY IMMERSING SAID METAL IN A HEATED ACID COATING SOLUTION HAVING VOLATILE OR DECOMPOSABLE COMPONENTS THEREIN, THE IMPROVEMENT WHEREBY LOSS OF COMPONENTS FROM SAID SOLUTION BY VOLATILIZATION AND DECOMPOSITION IS MINIMIZED, SAID IMPROVEMENT COMPRISING IMMERSING SAID METAL IN A HOT COATING SOLUTION COVERED WITH A NON-AQUEOUS SURFACE LAYER OF INERT MATERIAL WHICH IS LIQUID AT THE OPERATING TEMPERATURE, SAID LIQUID BEING SUBSTANTIALLY IMMISCIBLE WITH SAID ACID COATING SOLUTION, SUBSTANTIALLY NON-VOLATILE AND STABLE AT THE OPERATING TEMPERATURE OF SAID BATH AND INERT WITH RESPECT TO THE CONSTITUENTS OF THE BATH, BOTH SAID SOLUTION AND SAID LAYER HAVING A SURFACE ACTIVE AGENT DISSOLVED THEREIN, THE AMOUNT OF AGENT IN SAID SOLUTION BEING SUFFICIENT TO LOWER THE SURFACE TENSION THEREOF TO LESS THAN 40 DYNES/CM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |